Early Miocene volcanic activity and paleoenvironment conditions recorded in tephra layers of the AND-2A core (southern McMurdo Sound, Antarctica)
The ANtarctic geological DRILLing Program (ANDRILL) successfully recovered 1138.54 m of core from drill hole AND-2A in the Ross Sea sediments (Antarctica). The core is composed of terrigenous claystones, siltstones, sandstones, conglomerates, breccias, and diamictites with abundant volcanic material...
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ftopenaccessrep:oai:zenodo.org:105149 2023-10-25T01:30:49+02:00 Early Miocene volcanic activity and paleoenvironment conditions recorded in tephra layers of the AND-2A core (southern McMurdo Sound, Antarctica) Sergio Rocchi P. Del Carlo A. Di Roberto Kurt S. Panter 2012-01-01 https://www.openaccessrepository.it/record/105149 https://doi.org/10.1130/ges00754.1 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/105149 doi:10.1130/ges00754.1 info:eu-repo/semantics/openAccess NEANIAS Atmospheric Research Community Digital Humanities and Cultural Heritage Stratigraphy Geology info:eu-repo/semantics/article publication-article 2012 ftopenaccessrep https://doi.org/10.1130/ges00754.1 2023-09-26T22:20:46Z The ANtarctic geological DRILLing Program (ANDRILL) successfully recovered 1138.54 m of core from drill hole AND-2A in the Ross Sea sediments (Antarctica). The core is composed of terrigenous claystones, siltstones, sandstones, conglomerates, breccias, and diamictites with abundant volcanic material. We present sedimentological, morphoscopic, petrographic, and geochemical data on pyroclasts recovered from core AND-2A that provide insights on eruption styles, volcanic sources, and environments of deposition. One pyroclastic fall deposit, 12 resedimented volcaniclastic deposits and 14 volcanogenic sedimentary deposits record a history of intense explosive volcanic activity in southern Victoria Land during the Early Miocene. Tephra were ejected during Subplinian and Plinian eruptions fed by trachytic to rhyolitic magmas and during Strombolian to Hawaiian eruptions fed by basaltic to mugearitic magmas in submarine and/or subglacial to subaerial environments. The long-lived Mount Morning eruptive center, located ∼80 km south of the drill site, was recognized as the probable volcanic source for these products on the basis of volcanological, geochemical, and age constraints. The study of tephra in the AND-2A core provides important paleoenvironment information by revealing that the deposition of primary and moderately reworked tephra occurred in a proglacial setting under generally open-water marine conditions. Article in Journal/Newspaper Antarc* Antarctic Antarctica McMurdo Sound Ross Sea Victoria Land Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Antarctic McMurdo Sound Mount Morning ENVELOPE(163.750,163.750,-78.450,-78.450) Ross Sea The Antarctic Victoria Land Geosphere 8 6 1342 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
NEANIAS Atmospheric Research Community Digital Humanities and Cultural Heritage Stratigraphy Geology |
spellingShingle |
NEANIAS Atmospheric Research Community Digital Humanities and Cultural Heritage Stratigraphy Geology Sergio Rocchi P. Del Carlo A. Di Roberto Kurt S. Panter Early Miocene volcanic activity and paleoenvironment conditions recorded in tephra layers of the AND-2A core (southern McMurdo Sound, Antarctica) |
topic_facet |
NEANIAS Atmospheric Research Community Digital Humanities and Cultural Heritage Stratigraphy Geology |
description |
The ANtarctic geological DRILLing Program (ANDRILL) successfully recovered 1138.54 m of core from drill hole AND-2A in the Ross Sea sediments (Antarctica). The core is composed of terrigenous claystones, siltstones, sandstones, conglomerates, breccias, and diamictites with abundant volcanic material. We present sedimentological, morphoscopic, petrographic, and geochemical data on pyroclasts recovered from core AND-2A that provide insights on eruption styles, volcanic sources, and environments of deposition. One pyroclastic fall deposit, 12 resedimented volcaniclastic deposits and 14 volcanogenic sedimentary deposits record a history of intense explosive volcanic activity in southern Victoria Land during the Early Miocene. Tephra were ejected during Subplinian and Plinian eruptions fed by trachytic to rhyolitic magmas and during Strombolian to Hawaiian eruptions fed by basaltic to mugearitic magmas in submarine and/or subglacial to subaerial environments. The long-lived Mount Morning eruptive center, located ∼80 km south of the drill site, was recognized as the probable volcanic source for these products on the basis of volcanological, geochemical, and age constraints. The study of tephra in the AND-2A core provides important paleoenvironment information by revealing that the deposition of primary and moderately reworked tephra occurred in a proglacial setting under generally open-water marine conditions. |
format |
Article in Journal/Newspaper |
author |
Sergio Rocchi P. Del Carlo A. Di Roberto Kurt S. Panter |
author_facet |
Sergio Rocchi P. Del Carlo A. Di Roberto Kurt S. Panter |
author_sort |
Sergio Rocchi |
title |
Early Miocene volcanic activity and paleoenvironment conditions recorded in tephra layers of the AND-2A core (southern McMurdo Sound, Antarctica) |
title_short |
Early Miocene volcanic activity and paleoenvironment conditions recorded in tephra layers of the AND-2A core (southern McMurdo Sound, Antarctica) |
title_full |
Early Miocene volcanic activity and paleoenvironment conditions recorded in tephra layers of the AND-2A core (southern McMurdo Sound, Antarctica) |
title_fullStr |
Early Miocene volcanic activity and paleoenvironment conditions recorded in tephra layers of the AND-2A core (southern McMurdo Sound, Antarctica) |
title_full_unstemmed |
Early Miocene volcanic activity and paleoenvironment conditions recorded in tephra layers of the AND-2A core (southern McMurdo Sound, Antarctica) |
title_sort |
early miocene volcanic activity and paleoenvironment conditions recorded in tephra layers of the and-2a core (southern mcmurdo sound, antarctica) |
publishDate |
2012 |
url |
https://www.openaccessrepository.it/record/105149 https://doi.org/10.1130/ges00754.1 |
long_lat |
ENVELOPE(163.750,163.750,-78.450,-78.450) |
geographic |
Antarctic McMurdo Sound Mount Morning Ross Sea The Antarctic Victoria Land |
geographic_facet |
Antarctic McMurdo Sound Mount Morning Ross Sea The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica McMurdo Sound Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Sound Ross Sea Victoria Land |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/105149 doi:10.1130/ges00754.1 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1130/ges00754.1 |
container_title |
Geosphere |
container_volume |
8 |
container_issue |
6 |
container_start_page |
1342 |
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1780742469738037248 |